  abort - interrupt evaluation.
  ans - answer
  backslash (\) - left matrix division.
  bool2s - convert boolean matrix to a zero one matrix.
  boolean - Scilab Objects, boolean variables and operators & | ~
  brackets - ([,]) left and right brackets
  break - keyword to interrupt loops
  call - Fortran or C user routines call
  case - keyword used in select
  clear - kills variables
  clearglobal - kills global variables
  colon - (:) colon operator
  comma - (,) column, instruction, argument separator
  comments - comments
  continue - keyword to pass control to the next iteration of a loop
  date - Current date as date string
  debug - debugging level
  definedfields - return index of list's defined fields
  do - language keyword for loops
  dot - (.) symbol
  else - keyword in if-then-else
  elseif - keyword in if-then-else
  empty - ([]) empty matrix
  end - end keyword
  equal - (=) affectation, comparison equal sign
  errcatch - error trapping
  errclear - error clearing
  error - error messages
  error_table - table of error messages
  etime - Elapsed time
  evstr - evaluation of expressions
  exec - script file execution
  execstr - execute Scilab code in strings
  exists - checks variable existence
  exit - Ends the current Scilab session
  external - Scilab Object, external function or routine
  extraction - matrix and list entry extraction
  feval - multiple evaluation
  find - find indices of boolean vector or matrix true elements
  for - language keyword for loops
  format - number printing and display format
  fort - Fortran or C user routines call
  funptr - coding of primitives ( wizard stuff )
  getdate - get date and time information
  getenv - get the value of an environment variable
  getfield - list field extraction
  getpid - get Scilab process identificator
  getversion - get Scilab version name
  global - Define global variable
  gstacksize - set/get scilab global stack size
  hat - (^) exponentiation
  host - Unix or DOS command execution
  hypermat - initialize an N dimensional matrices
  hypermatrices - Scilab object, N dimensional matrices in Scilab
  iconvert - conversion to 1 or 4 byte integer representation
  ieee - set floating point exception mode
  if - conditional execution
  assignation - partial variable assignation
  insertion - partial variable assignation or modification
  intppty - set interface argument passing properties
  inttype - type integers used in integer data types
  inv_coeff - build a polynomial matrix from its coefficients
  iserror - error occurence test
  isglobal - check if a variable is global
  lasterror - get last recorded error message
  left - ([) left bracket
  less - (<) lower than comparison
  list - Scilab object and list function definition
  lsslist - Scilab linear state space function definition
  lstcat - list concatenation
  matrices - Scilab object, matrices in Scilab
  matrix - reshape a vector or a matrix to a different size matrix
  mlist - Scilab object, matrix oriented typed list definition.
  mode - select a mode in exec file
  mtlb_mode - switch Matlab like operations
  names - scilab names syntax
  null - delete an element in a list
  overloading - display, functions and operators overloading capabilities
  parents - ( ) left and right parenthesis
  pause - pause mode, invoke keyboard
  percent - (%) special character
  plus - (+) addition operator
  poly - polynomial definition
  power - power operation (^,.^)
  predef - variable protection
  getcwd - get Scilab current directory
  pwd - print Scilab current directory
  quit - decrease the pause level or exit
  quote - (') transpose operator, string delimiter
  rational - Scilab objects, rational in Scilab
  resume - return or resume execution and copy some local variables
  return - return or resume execution and copy some local variables
  rlist - Scilab rational fraction function definition
  sciargs - scilab command line arguments
  select - select keyword
  semi - (;) instruction and row separator
  semicolon - (;) ending expression and row separator
  setenv - set the value of an environment variable
  setfield - list field insertion
  slash - (/) right division and feed back
  stacksize - set scilab stack size
  star - (*) multiplication operator
  symbols - scilab operator names
  testmatrix - generate some particular matrices
  then - keyword in if-then-else
  tic - start a stopwatch timer
  tilda - (~) logical not
  tlist - Scilab object and typed list definition.
  toc - Read the stopwatch timer
  catch - beginning of catch block in try-catch control instruction
  try - beginning of try block in try-catch control instruction
  type - variable type
  typename - associates a name to variable type
  user - interfacing a Fortran or C routine
  varn - symbolic variable of a polynomial
  what - list the Scilab primitives
  where - get current instruction calling tree
  whereami - display current instruction calling tree
  whereis - name of library containing a function
  while - while keyword
  who - listing of variables
  who_user - listing of user's variables
  whos - listing of variables in long form